JP2023040869A - Twisted-wire conductor - Google Patents

Abstract

To provide a twisted-wire conductor which enables manufacture of a cross-sectional shape of a twisted-wire conductor to a shape close to a completed round without compression or at a low compression rate.SOLUTION: A twisted-wire conductor has an inner layer 2 composed of one central line 11 arranged at a central part, and a first outer layer 4 composed of a plurality of first outer layer lines 12 arranged outside the inner layer 2, wherein an outermost layer 5 composed of the same number as the number of first outer layer lines 12 of outer small-diameter lines 13, and the same number as the number of first outer layer lines 12 of outer large-diameter lines 14 thicker than the outer small-diameter lines 13 is arranged outside the first outer layer 4, the first outer layer lines 12 are arranged so as to be separated from each other in a circumferential direction, the outer large-diameter lines 14 are arranged outside between the first outer layer lines 12 and 12 adjacent to each other in the circumferential direction, and one outer small-diameter line 15 is arranged between the outside large-diameter lines 14 and 14 adjacent to each other in the circumferential direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to stranded conductors.

Conventionally, each element wire constituting a stranded conductor used for an electric wire or the like is generally a round wire with a circular cross section and the same diameter. A copper wire is mainly used as the element wire, and the copper wire is plated with various alloys such as tin, nickel, silver, or aluminum.

For example, a stranded conductor having a concentric twist configuration and composed of 19 strands generally has a single strand 102 at the center of the stranded conductor 101 as a nucleus, as shown in FIG. , 6 strands 103 surround it to form an inner layer, and further, 12 strands 104 surround its periphery to form an outer layer, which are then twisted in the same direction. ing.

Since the strands 102, 103, and 104 all have a circular cross section and the same diameter, when the strands 102, 103, and 104 are arranged in the standard core arrangement to form the stranded conductor 101, the outer peripheral shape As shown in FIG. 15, has a shape similar to a hexagon, and does not have a shape similar to a round shape. Hereinafter, this is referred to as prior art 1.

In general, as shown in FIG. 15, the stranded conductor 101 is used as an electric wire (coated wire) or the like 107 with an insulating material 106 covering the outer periphery thereof. Reducing the weight of the insulating material 106 is important from the viewpoint of effective utilization of resources, and for this reason, it is desired that the cross-sectional shape of the stranded conductor be a perfect circle.

However, if the stranded conductor is configured by 19 concentrically twisted strands of strands of the same diameter, for example, as shown in FIG. The thickness of the insulating material 106 is thin in the vicinity of the apex, and increases from the apex to the side, so that the thickness of the insulating material 106 becomes non-uniform. In addition, in order to prevent the breakdown voltage failure, the thickness of the insulating material 106 at the vertex becomes a standard, and the thickness of the insulating material 106 at the side becomes redundant and useless. A circle is desired.

Moreover, since the cross-sectional shape of the stranded conductor 101 is hexagonal, there is a problem that the stranded conductor 101 may be damaged when the insulating material 106 is stripped in the end processing of the coated wire or the like.

It is also desired that the cross-sectional shape of the stranded conductor be a perfect circle in a bundled stranded wire other than the concentric twist arrangement.

As a method of making the cross-sectional shape of the stranded conductor a perfect circle, for example, as described in Patent Document 1, strands 202 having a circular cross-section and all having the same diameter are twisted in one direction and passed through a compression die. , as shown in FIG. 16, a method has been proposed in which the cross-sectional shape of the stranded conductor 201 is formed into a substantially perfect circle. Hereinafter, this is referred to as prior art 2.

JP-A-11-25758

In the stranded conductor 201 of prior art 2, when the strands 202 are passed through the compression die, the outer layer strands are compressed and deformed, resulting in loss of physical properties such as stretchability, flexibility, and flexibility. There is a problem.

In addition, since the stranded conductor 201 of the prior art 2 needs to be passed through a compression die while being twisted in one direction, an extra compression die is required compared to the stranded conductor 101 of the prior art 1. Since the dies are worn and damaged during manufacture of the stranded conductor 201, they need to be replaced periodically, resulting in a problem of high cost.

In addition, in order to make the twisted wire after compression into a substantially perfect circle, it is necessary to set the number of rotations of the manufacturing machine (twisting machine) to a certain value or less and to stabilize the number of rotations. There is also the problem that the production efficiency is worse than that of the stranded conductor 101 .

In addition, since the stranded conductors 101 and 201 of the prior art are arranged so that all the adjacent wires are in contact with each other, the density of the wire arrangement is high, there is no gap between the adjacent wires, and the wires are stretched. There is a problem that physical properties such as properties, flexibility, and flexibility are impaired.

Therefore, the cross-sectional shape of the stranded conductor can be made closer to a perfect circle by compressing the strands without compression or by compressing the strands at a compression rate lower than that of the conventional technique 2. It is intended to provide

In order to solve the above-mentioned problems, the invention according to claim 1 provides an inner layer composed of one central line arranged in the center, or one central line arranged in the central part, having an inner layer composed of a first inner layer formed by arranging a plurality of first inner layer lines in a circumferential direction outside the center line;
A first outer layer composed of a plurality of first outer layer wires is arranged outside the inner layer,
Outside the first outer layer, the same number of outer thin-diameter wires as the first outer layer wires and the same number of outer thick-diameter wires as the first outer layer wires and thicker than the outer thin wires are provided. arranging the outermost layer,
disposing the first outer layer wires spaced apart in the circumferential direction,
The outer large-diameter wire is arranged outside between the circumferentially adjacent first outer layer wires, and one outer thin-diameter wire is arranged between the circumferentially adjacent outer large-diameter wires. It is a thing.

The invention according to claim 2 is an inner layer composed of one center line arranged in the center, or one center line arranged in the center and a plurality of second layers outside the center line. 1 has an inner layer configured by arranging inner layer wires in the circumferential direction,
A first outer layer composed of a plurality of first outer layer wires is arranged outside the inner layer,
a second outer layer composed of the same number of second outer layer wires as the number of the first outer layer wires is disposed outside the first outer layer;
Outside the second outer layer, the same number of outer thin-diameter wires as the first outer layer wires and the same number of outer thick-diameter wires as the first outer layer wires and thicker than the outer thin wires are provided. arranging the outermost layer,
disposing the first outer layer wires spaced apart in the circumferential direction,
disposing the second outer layer wires outside between the first outer layer wires adjacent in the circumferential direction;
The outer large diameter wire is arranged outside between the second outer layer wires adjacent in the circumferential direction, and one thin outer wire is arranged between the outer large diameter wires adjacent in the circumferential direction. It is.

In the invention according to claim 3, the distance from the center of the stranded conductor to the outer edge of the outer thin wire constituting the outermost layer,
In the invention according to claim 1 or 2, the distance from the center of the stranded conductor to the outer edge of the outer large-diameter wire constituting the outermost layer is the same.

The invention according to claim 4 is characterized in that, in the invention according to any one of claims 1 to 3, the wire constituting the outermost layer is compressed and deformed from the outside.

According to the invention of claim 1 of the present application, the inner layer is composed of one center line arranged in the center, or one center line arranged in the center and a plurality of lines outside the center line A first outer layer composed of a plurality of first outer layer wires is disposed outside the inner layer, and outside the first outer layer, By arranging the outermost layer composed of the same number of outer thin-diameter wires as the first outer layer wires and the same number of outer thick-diameter wires as the first outer layer wires and thicker than the outer thin-diameter wires The cross-sectional shape of the stranded conductor is substantially circular, and the diameter and weight of the stranded conductor can be reduced, and the flexibility of the stranded conductor can be improved.

In addition, unlike the stranded conductor 201 of prior art 2, the stranded conductor of the present invention can be made to have a substantially perfect circular outer shape without passing the strands through a compression die. It is possible to maintain the physical properties of the wire without impairing the physical properties such as elongation, flexibility, flexibility, etc., and obtain highly reliable quality. It can be effectively used in various fields.

Further, according to the invention of claim 2 of the present application, the inner layer configured by one center line arranged in the center, or one center line arranged in the center and outside the center line It has an inner layer configured by arranging a plurality of first inner layer wires in a circumferential direction, a first outer layer configured by a plurality of first outer layer wires is provided outside the inner layer, and the outer side of the first outer layer is provided. a second outer layer composed of the same number of second outer layer wires as the number of the first outer layer wires, and outside the second outer layer, the same number of outer thin wires as the number of the first outer layer wires; By arranging the outermost layer composed of the same number of wires as the first outer layer wires, and which is thicker than the outer thin wires, the same functions and effects as those of the first aspect of the invention are obtained. .

1 is a cross-sectional view of a stranded conductor according to Example 1 of the present invention; FIG. FIG. 4 is a cross-sectional view showing an example of a stranded conductor according to Example 3 of the present invention; FIG. 11 is a cross-sectional view showing another example of the stranded conductor according to Example 3 of the present invention; FIG. 11 is a cross-sectional view showing another example of the stranded conductor according to Example 3 of the present invention; FIG. 5 is a cross-sectional view showing an example of a stranded conductor according to Example 4 of the present invention; The cross-sectional view which shows the other example of the stranded conductor which concerns on Example 4 of this invention. The cross-sectional view which shows the other example of the stranded conductor which concerns on Example 4 of this invention. FIG. 11 is a cross-sectional view showing an example of a stranded conductor according to Example 5 of the present invention; FIG. 11 is a cross-sectional view showing another example of the stranded conductor according to Example 5 of the present invention; FIG. 11 is a cross-sectional view showing another example of the stranded conductor according to Example 5 of the present invention; FIG. 11 is a cross-sectional view showing another example of the stranded conductor according to Example 5 of the present invention; The cross-sectional view which shows an example of the stranded wire conductor which concerns on Example 6 of this invention. The cross-sectional view which shows the other example of the stranded wire conductor which concerns on Example 6 of this invention. The cross-sectional view which shows the other example of the stranded wire conductor which concerns on Example 6 of this invention. FIG. 2 is a cross-sectional view of a stranded conductor according to prior art 1; FIG. 10 is a cross-sectional view of a stranded conductor according to prior art 2;

A mode for carrying out the present invention will be described with reference to the drawings.

[Example 1]
FIG. 1 is a cross-sectional view of a stranded wire conductor 1 according to Example 1 of the present invention cut in a direction perpendicular to the axial direction. bottom.

The stranded conductor 1 has an inner layer 2 and an outer layer 3 provided outside the inner layer 2 . The inner layer 2 is composed of one centerline 11 .

The outer layer 3 is composed of two layers, a first outer layer 4 and an outermost layer 5 .

As shown in FIG. 1, the first outer layer 4 is configured by arranging three first outer layer wires (element wires) 12 provided on the outside of the inner layer 2 in the circumferential direction.

The outermost layer 5, as shown in FIG. It is configured to cover the first outer layer 4 .

The first outer layer wires 12 constituting the first outer layer 4 are arranged so as to be spaced apart in the circumferential direction, and a gap 18 is formed between adjacent first outer layer wires 12 , 12 .

The outer thick-diameter wire 14 forming the outermost layer 5 is arranged outside the gap 18 between the first outer layer wires 12, 12 forming the first outer layer 4 and adjacent to each other in the circumferential direction. 12, 12 is provided so as to abut.

The outer thin wire 13 forming the outermost layer 5 is one between the outer large diameter wires 14 and 14 adjacent in the circumferential direction, and the outer thick wire 14 and the first outer layer wire 12 forming the first outer layer 4 are connected. arranged to abut.

Wires that are the basis of the wires 11, 12, 13, and 14 include copper wires such as bare copper wires, oxygen-free copper wires, linear crystal oxygen-free copper wires, and single-crystal high-purity oxygen-free copper wires. Wires plated with tin, nickel, silver, etc., aluminum wires, various alloy wires, enameled wires, litz wires, formal wires and the like coated with insulation can be used. The materials of the wires 11, 12, 13 and 14 may be the same or different.

The diameter d1 of the center line 11 is set smaller than the diameter d2 of the first outer layer wire 12, and the diameter d2 of the first outer layer wire 12 is set smaller than the diameter d3 of the outer thin wire 13. The diameter d3 is set smaller than the diameter d4 of the outer large diameter wire 14 .

In Example 1, the wires 11, 12, 13, and 14 satisfying the relationships of d1=0.694×d2, d3=1.838×d2, and d4=2.425×d2 were used.

In addition, the cross-sectional shape of the stranded conductor 1 is a substantially perfect circle, that is, the distance L1 from the center A of the center line 11 to the outermost edge B of the outer thick wire 14, and the distance L1 from the center A of the center line 11 to the outer thin line. The distance L2 to the outermost edge C of the radial line 13 is formed to be the same.

Since the stranded conductor 1 of the present invention has the structure described above, it has the following functions and effects.

Since the outer shape of the stranded conductor 1 is substantially circular and, as described above, the diameter can be made smaller than that of the stranded conductor 101 of the prior art 1, the thickness of the insulating material coating can be reduced and the thickness can be substantially uniform. Since the insulating material can be reduced, the cost can be reduced.

In addition, unlike the stranded conductor 201 of the prior art 2, the stranded conductor 1 can be made to have a substantially perfect circular outer shape without passing the strands through a compression die. It is possible to maintain the physical properties of the wire without losing its physical properties such as flexibility and flexibility, and to obtain highly reliable quality. etc. can be effectively utilized.

In addition, the stranded conductor 1 has improved physical properties such as stretchability, flexibility, and flexibility by increasing the porosity and lowering the arrangement density of the strands compared to the conventional techniques 1 and 2. can be made

[Example 2]
In the strands constituting the stranded conductor 1 of the first embodiment, the diameter d1 of the center line 11 is smaller than the diameter d2 of the first outer layer wire 12, and the diameter d2 of the first outer layer wire 12 is smaller than the diameter d2 of the outer thin wire 13. and the diameter d3 of the outer thin wire 13 is smaller than the diameter d4 of the outer thick wire 14. For example, the stranded conductor 1 can be constructed using arbitrary strands other than the strands having the diameter described in the first embodiment. Alternatively, the outermost layer 5 may be compressed from the outer peripheral portion thereof using a compression die or the like.

By this compression, the outer peripheral portions of the outer thin wire 13 and the outer thick wire 14 forming the outermost layer 5 are compressed and deformed, and the outer shape of the stranded conductor can be made closer to a perfect circle. Compression using a compression die or the like may be performed when the stranded conductor 1 is manufactured, or may be performed after the stranded conductor 1 is manufactured. Note that the compression rate is set arbitrarily.

Since the rest of the structure is the same as that of the first embodiment, description thereof will be omitted.

Also in this second embodiment, the same effects as those of the above-described first embodiment can be exhibited.

[Example 3]
In Examples 1 and 2, the first outer layer wire 12 forming the first outer layer 4 and the outer thin wire 13 and outer thick wire 14 forming the outermost layer 5 are set to three each. The number of the first outer layer wires 12, the number of the thin outer wires 13, and the number of the thick outer wires 14 may be the same. can.

For example, as shown in FIG. are spaced apart in the circumferential direction, each strand 11 that satisfies the relationships d1 = 1.109 x d2, d3 = 1.350 x d2, and d4 = 1.850 x d2 , 12, 13, and 14, the cross-sectional shape of the stranded conductor 21 can be made substantially circular without compression or with a low compressibility.

For example, as shown in FIG. are spaced apart in the circumferential direction, each strand 11 satisfying the relationships d1 = 1.375 x d2, d3 = 1.125 x d2, and d4 = 1.563 x d2 , 12, 13, and 14, the cross-sectional shape of the stranded conductor 22 can be made substantially circular without compression or with a low compressibility.

For example, as shown in FIG. are spaced apart in the circumferential direction, each strand 11 satisfying the relationships d1 = 1.750 x d2, d3 = 1.013 x d2, and d4 = 1.419 x d2 , 12, 13, and 14, the cross-sectional shape of the stranded conductor 23 can be made substantially circular without compression or with a low compressibility.

Since other structures are the same as those of the first and second embodiments, description thereof is omitted.

Also in the third embodiment, it is possible to exhibit the same effects as in the first and second embodiments.

[Example 4]
In Examples 1 to 3 above, the inner layer 2 was composed of one center line 11, but the center line 31 and the number of the first outer layer lines 12 of the first outer layer 4 outside the center line 31 The inner layer 33 may be composed of the first inner layer 32 formed by arranging the same number of first inner layer wires 15 in the circumferential direction.

The first inner layer wires 15 are arranged outside the center line 31, and the adjacent first inner layer wires 15, 15 are arranged so as to contact each other. As the wire material that forms the basis of the first inner layer wire 15, the same wire material as the wire material that forms the basis of the wires 11, 12, 13, and 14 is used.

The first outer layer wire 12 is arranged outside the valley portion 34 formed by the adjacent first inner layer wires 15 , 15 so as to be in contact with the first inner layer wires 15 , 15 .

For example, as shown in FIG. The first outer layer 4 is formed by disposing eight first outer layer wires 12 spaced apart in the circumferential direction around the first outer layer 4, and the first outer layer 4 is surrounded by eight thin outer wires 13 and eight wires. The outermost layer 5 may be covered with a large-diameter wire to constitute the stranded conductor 35 .

Each strand satisfying the relationships of d1=1.269×d2, d3=0.825×d2, d4=1.200×d2, and d5=0.788×d2, where d5 is the diameter of the first inner layer wire 15 By using the wires that are the bases of 11, 12, 13, 14, and 15, the cross-sectional shape of the stranded conductor 35 can be made substantially circular without compression or with a low compressibility.

For example, as shown in FIG. 6, the first inner layer wire 15 of the first inner layer 32, the first outer layer wire 12 of the first outer layer 4, the outer thin wire 13 and the outer thick wire 14 which constitute the outermost layer 5 are 10 each, and in the case of the stranded conductor 36 in which the first outer layer wires 12 are spaced apart in the circumferential direction, d1=1.900×d2, d3=0.750×d2, d4=1. By using the wires that form the basis of the wires 11, 12, 13, 14, and 15 that satisfy the relationship of 088×d2, d5=0.850×d2, the stranded conductor 36 can be compressed without compression or with a low compression rate. can be made substantially circular in cross section.

For example, as shown in FIG. 7, the first inner layer wire 15 of the first inner layer 32, the first outer layer wire 12 of the first outer layer 4, the outer thin wire 13 and the outer thick wire 14 which constitute the outermost layer 5 are 12 each, and in the case of the stranded conductor 37 in which the first outer layer wires 12 are spaced apart in the circumferential direction, d1=2.862×d2, d3=0.769×d2, d4=1. By using the wires that are the bases of the wires 11, 12, 13, 14, and 15 that satisfy the relationship of 154×d2, d5=d2, the cross-sectional shape of the stranded conductor 37 can be adjusted with no or low compression rate. It can have a substantially perfect circular shape.

Other structures are the same as those of Examples 1 to 3, and description thereof is omitted.

Also in the present embodiment 4, it is possible to exhibit the same effects as those of the above embodiments 1 to 3.

[Example 5]
In Examples 1 to 3 above, the outer layer 3 is composed of two layers, the first outer layer 4 and the outermost layer 5, but the outer layer 41 is composed of three layers, the first outer layer 4, the second outer layer 42, and the outermost layer 5. may be configured.

The center line 11 and the first outer layer 4 are configured in the same manner as in Examples 1 to 3 above.

The second outer layer 42 is configured by arranging the same number of second outer layer wires 16 as the number of the first outer layer wires 12 of the first outer layer 4 outside the first outer layer 4 so as to be spaced apart in the circumferential direction. ing. A gap 43 is formed between the adjacent second outer layer wires 16 , 16 . As the wire material that forms the basis of the second outer layer wire 16, the wire material that forms the basis of the wires 11, 12, 13, and 14 is used.

The second outer layer wire 16 is provided outside the gap 18 between the first outer layer wires 12 , 12 so as to abut on the first outer layer wires 12 , 12 .

The outer thick-diameter wire 14 forming the outermost layer 5 forms the second outer layer 42, and is positioned outside the gap 43 between the second outer layer wires 16, 16 adjacent in the circumferential direction. , 16 in contact therewith.

The thin outer wire 13 constituting the outermost layer 5 is connected between the outer thick wires 14 and 14 adjacent in the circumferential direction, and the thick outer wire 14 and the second outer layer wire 16 constituting the first outer layer 4 are connected. arranged to abut.

For example, as shown in FIG. 8, one center line 11 is arranged, and three first outer layer lines 12 are arranged around the center line 11 so as to be spaced apart in the circumferential direction to form the first outer layer. 4, three two-layer wires 16 are arranged around the first outer layer 4 so as to be spaced apart in the circumferential direction to form a second outer layer 42, and three wires are arranged around the second outer layer 42. The outermost layer 5 may be formed by covering the thin outer wire 13 and three thick outer wires to form the stranded conductor 45 .

Each strand satisfying the relationships of d1=0.684×d2, d3=3.868×d2, d4=5.105×d2, and d6=2.105×d2, where d6 is the diameter of the second outer layer wire 16 By using the wires that are the bases of 11, 12, 13, 14, and 16, the cross-sectional shape of the stranded conductor 45 can be made substantially circular without compression or with a low compressibility.

For example, as shown in FIG. 9, a first outer layer wire 12 of the first outer layer 4, a second outer layer wire 16 of the second outer layer 42, and an outer thin wire 13 and an outer thick wire 14 forming the outermost layer 5 are four each, and in the case of the stranded conductor 46 in which the first outer layer wires 12 and the second outer layer wires 16 are spaced apart from each other in the circumferential direction, d1=0.833×d2, d3=2.571 By using the wire material that is the basis of each of the wires 11, 12, 13, 14, and 16 where the relationship of xd2, d4 = 3.524 x d2, d6 = 1.905 x d2 is established, no compression or low compression At a rate, the cross-sectional shape of the stranded conductor 46 can be made substantially circular.

For example, as shown in FIG. 10, a first outer layer wire 12 of the first outer layer 4, a second outer layer wire 16 of the second outer layer 42, and an outer thin wire 13 and an outer thick wire 14 which constitute the outermost layer 5 are five, and in the case of the stranded conductor 47 in which the first outer layer wires 12 are spaced apart in the circumferential direction, d1=1.133×d2, d3=2.000×d2, d4=2. By using the wire materials that form the bases of the wires 11, 12, 13, 14, and 16 that satisfy the relationship of 778×d2, d6=1.778×d2, the stranded conductor 47 can be compressed without or at a low compression rate. can be made substantially circular in cross section.

For example, as shown in FIG. 11, a first outer layer wire 12 of the first outer layer 4, a second outer layer wire 16 of the second outer layer 42, and an outer thin wire 13 and an outer thick wire 14 which constitute the outermost layer 5 are six, and in the case of the stranded conductor 48 in which the first outer layer wires 12 are spaced apart in the circumferential direction, d1=1.400×d2, d3=1.620×d2, d4=2. By using the wires that form the bases of the wires 11, 12, 13, 14, and 16 that satisfy the relationship of 270×d2, d6=1.600×d2, the stranded conductor 48 can be compressed without compression or with a low compression rate. can be made substantially circular in cross section.

Since other structures are the same as those of the first to third embodiments, description thereof is omitted.

Also in the present Example 5, it is possible to exhibit the same effects as those of the above Examples 1 to 3.

[Example 6]
In the fifth embodiment, the inner layer 2 is composed of one center line 11, but the center line 31 and the first outer layer 4 outside the center line 31 are formed in the same manner as in the fourth embodiment. The inner layer 33 may be composed of the first inner layer 32 formed by arranging the same number of the first inner layer wires 15 as the number of the outer layer wires 12 in the circumferential direction.

For example, as shown in FIG. 12, one center line 31 is provided, and eight first inner layer wires 15 are arranged around the center line 31 to form the first inner layer 32. The first outer layer 4 is formed by disposing eight first outer layer wires 12 circumferentially spaced around it, and eight two outer layer wires 16 are circumferentially arranged around the first outer layer 4. A second outer layer 42 is formed by arranging them apart from each other, and the outermost layer 5 is formed by covering the second outer layer 42 with eight thin outer wires 13 and eight thick outer wires 13 and twisted. A line conductor 51 may be used.

Each strand 11, 12 satisfying the relationship of d1=1.145×d2, d3=1.200×d2, d4=1.745×d2, d5=0.709×d2, d6=1.455×d2 , 13, 14, 15, and 16, the cross-sectional shape of the stranded conductor 51 can be made substantially circular without compression or with a low compressibility.

For example, as shown in FIG. 13, the first inner layer wire 15 of the first inner layer 32, the first outer layer wire 12 of the first outer layer 4, the second outer layer wire 16 of the second outer layer 42, and the outermost layer 5 are configured. In the case of a stranded conductor 52 in which ten outer thin wires 13 and ten outer thick wires 14 are arranged and the first outer layer wires 12 are spaced apart in the circumferential direction, d1=1.990×d2, d3=1.101×d2, d4=1.596×d2, d5=0.881×d2, and d6=1.468×d2. By using the wire that is the basis of , the cross-sectional shape of the stranded conductor 52 can be made substantially circular with no or low compression.

For example, as shown in FIG. 14, the first inner layer wire 15 of the first inner layer 32, the first outer layer wire 12 of the first outer layer 4, the second outer layer wire 16 of the second outer layer 42, and the outermost layer 5 are configured. In the case of a stranded conductor 53 in which 12 outer thin wires 13 and 12 outer thick wires 14 are arranged and the first outer layer wires 12 are spaced apart in the circumferential direction, d1=2.480×d2, d3 = d2, d4 = 1.400 x d2, d5 = 0.850 x d2, d6 = 1.500 x d2. By using a wire material, the cross-sectional shape of the stranded conductor 53 can be made into a substantially circular shape without compression or with a low compression rate.

Since other structures are the same as those of the first to fifth embodiments, description thereof is omitted.

Also in this sixth embodiment, the same effects as those of the above-described first to fifth embodiments can be exhibited.

1, 21, 22, 23, 35, 36, 37, 45, 46, 47, 48, 51, 52, 53 stranded conductor 2, 33 inner layer 3, 41 outer layer 4 first outer layer 5 outermost layer 11, 31 center line 12 first outer layer wire 13 outer thin wire 14 outer thick wire 15 first inner layer wire
16 second outer layer wire 32 first inner layer 42 second outer layer

However, if the stranded conductor is configured by 19 concentrically twisted strands of strands of the same diameter, for example, as shown in FIG. The thickness of the insulating material 106 is thin in the vicinity of the apex, and increases from the apex to the side, so that the thickness of the insulating material 106 becomes non-uniform. In addition, in order to prevent the breakdown voltage failure, the thickness of the insulating material 106 at the vertex becomes a standard, and the thickness of the insulating material 106 at the side becomes redundant and useless. A circle is desired _.

In order to solve the above-mentioned problems, the invention according to claim 1 provides an inner layer composed of one central line arranged in the center, or one central line arranged in the central part, having an inner layer composed of a first inner layer formed by arranging a plurality of first inner layer lines in a circumferential direction outside the center line;
A first outer layer composed of a plurality of first outer layer wires is arranged outside the inner layer,
Outside the first outer layer, the same number of outer thin-diameter wires as the first outer layer wires and the same number of outer thick-diameter wires as the first outer layer wires and thicker than the outer thin wires are provided. arranging the outermost layer,
disposing the first outer layer wires spaced apart in the circumferential direction,
arranging one outer thick-diameter wire outside between the first outer layer wires adjacent in the circumferential direction , and arranging the outer thick-diameter wires spaced apart in the circumferential direction;
It is characterized in that one thin outer wire is arranged between the outer thick wires adjacent in the circumferential direction so as to be in contact with the first outer layer wire .

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the distance from the center of the stranded conductor to the outer edge of the outer thin wire constituting the outermost layer; It is characterized in that the distance from the center of the stranded conductor to the outer edge of the outer thick-diameter wire forming the outermost layer is the same.

According to the invention of claim 1 of the present application, the inner layer is composed of one center line arranged in the center, or one center line arranged in the center and a plurality of lines outside the center line A first outer layer composed of a plurality of first outer layer wires is disposed outside the inner layer, and outside the first outer layer, an outermost layer composed of the same number of outer thin-diameter wires as the first outer layer wires and the same number of outer thick-diameter wires as the first outer layer wires and thicker than the outer thin-diameter wires ; One outer thick-diameter wire is disposed outside between the first outer layer wires adjacent in the direction, the outer thick-diameter wires are disposed apart in the circumferential direction, and one outer thick-diameter wire is disposed between the outer thick-diameter wires adjacent in the circumferential direction. By arranging the outer fine-diameter wire so as to be in contact with the first outer layer wire , the cross-sectional shape of the stranded conductor is made substantially circular, and the stranded conductor is made thinner, lighter, and more flexible. can be improved.

For example, as shown in FIG. 8, one center line 11 is arranged, and three first outer layer lines 12 are arranged around the center line 11 so as to be spaced apart in the circumferential direction to form the first outer layer. 4, three second outer layer wires 16 are arranged around the first outer layer 4 so as to be spaced apart in the circumferential direction to form the second outer layer 42, and three wires are arranged around the second outer layer 42. The outermost layer 5 may be covered with the outer thin wire 13 and the three outer thick wires 14 to form the stranded conductor 45 .

For example, as shown in FIG. 12, one center line 31 is provided, and eight first inner layer wires 15 are arranged around the center line 31 to form the first inner layer 32. The first outer layer 4 is formed by arranging eight first outer layer wires 12 circumferentially spaced around it, and eight second outer layer wires 16 are circumferentially arranged around the first outer layer 4. The outermost layer 5 is formed by covering the second outer layer 42 with eight thin outer wires 13 and eight thick outer wires 14 . A twisted wire conductor 51 may be used.

Claims (4)

An inner layer composed of one center line arranged in the center, or one center line arranged in the center and a plurality of first inner layer lines arranged in the outer side of the center line in the circumferential direction. having an inner layer composed of a first inner layer formed by providing
A first outer layer composed of a plurality of first outer layer wires is arranged outside the inner layer,
Outside the first outer layer, the same number of outer thin-diameter wires as the first outer layer wires and the same number of outer thick-diameter wires as the first outer layer wires and thicker than the outer thin wires are provided. arranging the outermost layer,
disposing the first outer layer wires spaced apart in the circumferential direction,
The outer large-diameter wire is arranged outside between the circumferentially adjacent first outer layer wires, and one outer thin-diameter wire is arranged between the circumferentially adjacent outer large-diameter wires. Stranded conductor. An inner layer composed of one center line arranged in the center, or one center line arranged in the center and a plurality of first inner layer lines arranged in the outer side of the center line in the circumferential direction. having an inner layer formed by
A first outer layer composed of a plurality of first outer layer wires is arranged outside the inner layer,
a second outer layer composed of the same number of second outer layer wires as the number of the first outer layer wires is disposed outside the first outer layer;
Outside the second outer layer, the same number of outer thin-diameter wires as the first outer layer wires and the same number of outer thick-diameter wires as the first outer layer wires and thicker than the outer thin wires are provided. arranging the outermost layer,
disposing the first outer layer wires spaced apart in the circumferential direction,
disposing the second outer layer wires outside between the first outer layer wires adjacent in the circumferential direction;
The outer large diameter wire is arranged outside between the second outer layer wires adjacent in the circumferential direction, and one thin outer wire is arranged between the outer large diameter wires adjacent in the circumferential direction. Stranded conductor. a distance from the center of the stranded conductor to the outer edge of the thin outer wire constituting the outermost layer;
3. The stranded conductor according to claim 1, wherein distances from the center of the stranded conductor to outer edge ends of the outer large-diameter wires forming the outermost layer are the same. The stranded conductor according to any one of claims 1 to 3, wherein the wires forming the outermost layer are compressed and deformed from the outside.

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